ALBANY — Police say a 15-year-old girl who temporarily blinded a 10th-grader gave her victim a blunt, chilling warning just before the attack: "You're going to get the bleach."

The girl was arrested Wednesday and charged with second-degree assault in the Feb. 3 attack outside the public library's new Arbor Hill/West Hill branch, Officer James Miller said. The 16-year-old boy, a Green Tech Charter High School student, was temporarily blinded in one eye.

The boy's mother said her son is recovering and is glad his tormenter has been caught.

"He said he can forgive her but he can't forget what happened," said the woman, who asked to be referred to only as Joyce.

Miller said the attack may be part of a new, disturbing trend of young girls in Albany carrying unassuming-looking soda bottles loaded with bleach.

Police took a bleach-filled bottle from a girl on Monday. In that case, the girl was carrying but did not spray the bleach during an after-school fight near North Lake and Western avenues.

The two incidents do not match any nationwide or past trends, Miller said. Police gave the following account of the Feb. 3 attack:

At 1 p.m., the boy and a friend went to the library's teen section, where the girl and her friend made fun of the boy for his looks and the color of his shoelaces.

The bully recorded the boy's reaction with her cellphone, but he swatted the phone out of her hand. The boys and girls argued and a librarian asked them to leave. The girl warned the boy he was going to "get the bleach."

When they ran into each other outside, about a block away from police headquarters, the girl unscrewed the bottle, squirted the bleach into the boy's eye and ran.

The girl was charged with felony assault and ordered to appear in family court.

The mother said her son, who lost vision in his eye for one day, is quiet, keeps to himself and often goes to the library to read and study math. She said he has been teased before but never attacked.

"Why is someone carrying a soda bottle of bleach around with them?" the mother said.